Portion of a golf club head



FIG. 1 is a top perspective view of a portion of a golf club head showing our new design;

FIG. 2 is a top view thereof;

FIG. 3 is a toe end view thereof;

FIG. 4 is a heel end view thereof;

FIG. 5 is a front view thereof; and,

FIG. 6 is a rear view thereof.

The uneven broken line immediately adjacent to the shaded area represents an unclaimed boundary of the design. The broken line showing of the remainder of the golf club head is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portion of a golf club head, as shown and described. 